Piston-groove cleaner and deepener



Oct; 4', 1927. f

G. c. BECK Pls'rori GROOVE CLEANER AND' DEEPENER v Filed Feb. '2. 1927 T INVENTOR GeoryeCLZecJ W ATTORNEY Patented Oct. '4, 1927.

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=' f m l M GEORGE c. BECK, OF SPOKANE, WA SHIjNGTON.

, i a ,r Md M? PISTON-GROOVE CLEANER AND DEEPENER.

The object (if'this inventionvis to provide a device for either cleaniii'g qut carboii 'or ,1 deepening the ring gro'ovesof pisteii's of explosion engines. r l- ,5 Oiie f the features of this invention thatfthe piston is fieatiiigly held in such "a ma'hrier, that the pisten may be turlie d by hand to' effectrthe cleaning 01'- deepenin efthegroeves A furtherfezituie resides in a moving fulefuiii vvhich ispfeferebly in the term of La i oller :i-gains't ivvhichi the pis'tn is yielcl'ifigly held the roller facilitating the 'iiiaii'ual turni ig' Of the. pistbn.

cuttiiigto ol in sucha, novel relatidn with: the rolling 'fiilenim and the yieldiiigly' held iistdn that the latterjvill tulejifuin on both and ivill be fre to teke sueh a jp ositipn dur- 2O iiigthe g foove,

A fiifther f atlire consists ;in so disposiiig the ctitt-irig tool that instead et the latter perfefihing its function by a draggir'ig cut, the se iie ivillperfol'in its funeti oilby a leading'eut; i

The invention includes varie is ine'glns of adjustments 'andifeedin liieehaiii s'm all of which Will fbe more, fully ',dese1"ihed in conrie'ctin ivithfthe accoi ipaiiying drawing and which will he in reptit-iejilarly pdintedout in kind by the zip p'ende d claims. In the dravviii'g: 4 I i Fig. "lis e plan view of the device adjusted to eleain dr'deepen apistoii groove, the device being shown in dotted lines ito illustrate the thine" iii vvhieh a; "pistdn eah be releised, Fig/218R sectional view On line 2 2 of Fig-.1,

,FigQB is e seetieiiill view en liiie 3 3 (if -Fig. 2,

Fig.

Fig. 1,

lis a sectionalview On line 41- 4 of Fig. 5 1s a s'eetibilel view oii line of f W I t rein-dell 'stud'1j6 issiiitablv seet -rednt'gi-the 7 said 'h'qlder tindis'blidw stud 16 Fi 1, and

v 'L'ike eliirhctei's ef fefe'teiiee. design'ate eimilair peifts throligheiit the different figures of the drawilig; 1 .1 In the fofih'shovvn, the devlce irichides pivotetlly united levers and 61 "cli's'tiiitive nv ni ni tu V de s'igiiate lever Laisthe eilttin'g lever beea ise it denies the cuttiirg todlfiiid lfwi'll. designate lever 2 as the holding level because it "iii'g'leverflr r i 1; I

' If Said leverv 2 isfeoncavely 'arcuate-Jat. 45,170 'affi'ord room for opei'atimg en the largest: size piston and I liavepnevided said levermith will j presently a'p'peen A further feature eonsists i n dispesiiigv a,

irig the cutting epe'rzitien "as to "avoid gou "n er andhldih g the piston-A4 i I shatpethe I anchoring "jolurn'al and partial housing for .a Ifuldrum 7 1101161 1'0, thegsamejh aving a spindle 1l.f0r rotetively supportii igthero lleriin the posi-" tieh shewnl St1ip sprin'g12 has dfieend' enhored at 13 to h1g5, and isef sufficient length to extend'aeross lever 2 to'provide -ier 'leiigthvvi se adjustment ofi said pringita-aci e0niii fiodgit-e "pistons ,ofi difie rent diameter. Said s ring is, tempered t'oflnormalljv seek a Fig. 6 is ase'tiaim vie'vv 2m iine e4; bf answe e gest 'fiirther desic'friptioii, I n H :em gigsi thezifiea risffoi holdiiiigihlti tiin ii in position;- 1 These levers 1 and 2 are pivotally cqnneeted at 3 t0 hfierd: 'I-elative movement theredf as shown; in dotted lines: 1" 1.

suppoi t a tool feeding device whichileongigt's, as shewr oi ethi'eaded-rod 7;.ihaving threaded engagement with (lug '6, and pro- 1 will fi'rst specifically describe the ibidvided with 'a menually-idperalqle feed Wheel 7', w hieh may, if desired, vbe provided with "stiitahletgraduations28. -1 E An adjusting s10t9 "1s -p 1"1OVlded -lIl said lever 2, which will be 'presentlykdeseribedrg 'Refelen'ce will n'ext he means of .floati-ngly and yieldingly' straight ppsitie'n andr ntlst-rbe fljexed against s'ii'h tend ncy in order to beidi sposed in the 0pe1 etive p0sitien; shown. Said :fipringwlfi,

is shewn pi ovidledwith equidistelitly spaced holding bpenings-lc whiehliperform vari- 011s initiations that' Will pfes'entlyi'be deextiids dewnjwar 11yt;hrouglg slee- 9 end {is provided-with a wviih'er; 1 7 aind ein ed 'nut- 18, whereby tensio'il may be eppliedto fritioae lly hold theyi-ree end of the spring 12 the 11esi edgpositijon; lt will nqvv be e'leerthat the spring-[12 adjusteblel ii' thie through tH ,h 1dr- 15 tilde-that the *justmiit' fiir pistons of difleienc diaineter.

. tool to meet the requirements.

' advanced to its work.

For a larger piston than that shown, the spring 12 would not only be let'out but the holder would be adjusted to the right of the position shown. WVhile I might rely upon frictionally holding the free end of the spring in the holder I preferably provlde means for positively performing this function which I will next describe in detail.

b'aid holder 15 is shown provided with three openings 19 extending through both sides of the holder as will be clear from Fig. 3. These openings 19 are spaced a different distance apart from the openings 14, and by reason'of the holder having a plurality of openings 19, it will be seen that the lengthwise adjustment of spring 12'may be made invery limited graduations. I employfastening means such as a screw 20 for extending through the openings to positively hold the spring 12 in its adjusted position.

In order to prevent the piston A from slipping downwardly out ofrelation. with spring 12, I provide the following means.

Said means consists, as shown, of one or more studs 21- adapted for insertion in the groove of the piston as clearly shown in Figs. 1 and 4, the studs21 having a greater cross section in one direction than the other, whereby they may be used for grooves of different sizes thereby greatly reducing the total number of studs necessary for each Each stud has a threaded stem 22, adapted to project through one of the holes 14, and a thumbnut 23, whereby the stud may be tightened into position. In practice, I find it advisable to employ at least two-studs, as clearly shown in Fig. 1, the spacing of the studs being such as to engage the piston nearest the points where the spring 12 begins to spread away from the piston.

I will next describe lever 1, and the means thereon for coaction with lever 2. .7

Lever 1 has a feed abutment lug 24, so that when feed 'screw7 is advanced, the levers l and-2 will be relatively displaced and the cutting tool, to be described, will be It will be notedthat the feeding means actuates the relatively movable levers neartheir overlapping juncture in such relation as to move the levers into or toward an alined relation. I have shown lever 1 provided with a ledge 25 against which a cutting tool 26 abuts. A lug 27 on lever 1, affords stock for a toolholding screw 28 for frictionally holding the tool 26 in a fixed position with a sufficient projection of'the-cutting end toinsure entry of the latter into the piston groove.

The operation of my device is as follows: a The spring 12 is adjusted in accordance with thediameter'of piston to be operated upon so thatthere will be enough frictional tensionon the piston A; together with the tool will not have a drag engagement such as would gouge deep cuts, but will have a rolling engagement with the groove by reason of the fact that the tool is positioned as shown, in advance of line 13-13, as regards the cutting edge. lVith the parts as shown in full lines in Fig. 1, the piston A fulcrums on roller 10' and on the edge of tool 26 and because of the resiliency of spring 12, a piston A can automatically shift its position sufficiently so that if the toolshould be cutting too deeply, the piston can move away from the tool to reduce the cut. The piston will be manually rotated in the contra-clockwise direction indicated by the arrow in Fig. Land the roller '10 will greatly facilitate rotation of the piston and will afford the main point of fulcrum as the piston seeks to adjust its position responsive to the action of the cutting tool, the latter forming a secondary fulcrum.

It will now be clear that by reason of. the

bend C and the bend D, in the spring 12, and the close proximity of the roller 10 and cutting tool'26, the piston A will be yieldingly and fioatingly held in such a manner that it can automatically shift its position in any direction laterally of its longitudinal axis.

I have successfully deepened the grooves of cast iron and also aluminum pistons, the

latter being easily turned by hand'by reason of the novel means whereby friction is re duced to a minimum.

It is believed that the device of my invention wlllbe fully understood from the forelOO going description and while I have herein 'tool with respect to the direction ofrotation of the piston, and means forrelatively shifting said levers to feed said'tool into the g oove o th pist clean or deepen the 2. In a piston groove cleaner and deepener, pivotally united cutting and holding levers, said' holding lever having a roller piston fulcrum, a strip spring adapted to be looped about a piston to floatingly hold the latter against said fulcrum, said cutting lever havinga cutting tool adjustably fixed thereon, and means for relatively shifting said levers to advance said cutting tool into one of the piston grooves.

3. In a piston groove cleaner and deepener, a holding member havinga roller piston fulcrum, a springstrip adapted to be looped about a piston to floatingly hold the latter against said fulcrum, and cutting means for engagement with a groove of the piston to clean or deepen the groove as the piston is manually rotated.

4. In a piston groove cleaner and deepener, a holding member having a roller fulcrum, means connected with said member for floatingly and yielding holding a piston against said roller and permit the piston to be manually turned, and cutting means for engagement with a groove in the piston to said groove as said pis ton is turned.

5. In a piston groove cleaner and deepener, a holding member provided with a piston fulcrum, a piston holding strip spring flexed to embrace and hold a piston against said fulcrum, one end of said spring being anchored to said member and the remaining end of said spring extending across said member, means for connecting the latterend of said spring to said member in different longitudinal positions with respect to said spring to accommodate pistons of different sizes, and cutting means engaging a groove in the piston.

6. In a piston groove cleaner and deepener, a holding member provided with a piston fulcrum, a piston holding strip spring flexed to embrace and'hold a piston against said fulcrum, one end of said spring being anchored to said member and the remaining end extending across said member, means adjustable to various positions on said member and longitudinally adjustable on the extending end of said spring for holding the latter in position to accommodate pistons of different diameter, and cutting means for engagement with the groove of the piston.

7. In a piston groove cleaner and deepener, a holding member, a piston holding strip spring secured to said member and being flexed to embrace and hold a piston against said member, means coacting with a groove in the piston and said spring for holding one thereof against movement with respect to the other, and cutting means for engagement with a groove in the piston.

8. In a'piston groove cleaner and deepener, a holding member, a strip spring flexed to embrace and hold a piston against said member and one end of said spring being anchored to said member, said spring having spaced openings extending longitudinally thereof, an adjustable anchorage device adjustable on said member to increase or reduce the flexurev of said spring to accome modate pistons of different diameter, said device having'openings therein spaced at different distances from centers with respect to the spacing of the openings in said spring, said device having a pin for selective engagement with the openings in said device and spring to alter the size of the loop formed by said flexed spring, and cutting means for engagement wlth a groove in the piston.

In witness whereof, I hereby aflix my signature. 

